package com.highcom.config;



import com.highcom.model.Permission;
import com.highcom.model.Role;
import com.highcom.model.User;
import com.highcom.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.Set;

@Component
public class SpringSecurityUserService implements UserDetailsService {

    @Autowired
    private UserService userService;

    //根据用户名查询数据库获取用户信息
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        User user = userService.findByUserName(username);

        if (user == null){
            //用户名不存在
            return null;
        }
        ArrayList<GrantedAuthority> list = new ArrayList<>();
        //动态为当前用户授权
        Set<Role> roles = user.getRoles();
        for (Role role:roles){
            //遍历角色集合，为用户授予角色
            list.add(new SimpleGrantedAuthority(role.getKeyword()));
            Set<Permission> permissions = role.getPermissions();
            //遍历权限集合，为用户授权
            for (Permission permission:permissions){
                list.add(new SimpleGrantedAuthority(permission.getKeyword()));
            }
        }
        org.springframework.security.core.userdetails.User user1 =
                new org.springframework.security.core.userdetails.User(username,user.getPassword(),list);
        return user1;
    }
}
